// 顶部菜单
.fule-header__menu {
  display: none;
  vertical-align: middle;
  width: 20px;
  padding: 2px;
  margin-left: 16px;
  cursor: pointer;

  &-item {
    display: block;
    height: 2px;
    border-radius: 10px;
    background-color: #444;
    margin-bottom: 5px;
    transition: background 0.4s cubic-bezier(0.77, 0.2, 0.05, 1),
      opacity 0.45s ease, transform 0.4s cubic-bezier(0.77, 0.2, 0.05, 1),
      width 0.4s;

    &:last-child {
      margin-bottom: 0;
    }
  }

  &.is-actived &-item {
    transform: rotate(-45deg);
    transform-origin: 20px;

    &:nth-child(2) {
      width: 0;
      opacity: 0;
      -ms-transform: rotate(0deg);
      transform: rotate(0deg);
      transition: width 0.5s ease;
    }

    &:nth-child(3) {
      transform: rotate(43deg);
    }
  }

  @media screen and(max-width:768px) {
    display: inline-block;
  }
}